List of Lewis Barnavelt novels
List of novels

#
Title
Month
Year
Writer
Illustrator
01
The House with a Clock in Its Walls
Jun
1973
John Bellairs
Edward Gorey
02
The Figure in the Shadows
-
1975
John Bellairs
Mercer Mayer
03
The Letter, the Witch, and the Ring
Jan
1976
John Bellairs
Richard Egielski
04
The Ghost in the Mirror
Apr
1993
John Bellairs and Brad Strickland
Edward Gorey
05
The Vengeance of the Witch-finder
Sep
1993
John Bellairs and Brad Strickland
Edward Gorey
06
The Doom of the Haunted Opera
Sep
1995
John Bellairs and Brad Strickland
Edward Gorey
07
The Specter from the Magician's Museum
Mar
1998
Brad Strickland
Edward Gorey
08
The Beast Under the Wizard's Bridge
-
2000
Brad Strickland
Edward Gorey
09
The Tower at the End of the World
Sep
2001
Brad Strickland
S. D. Schindler
10
The Whistle, the Grave, and the Ghost
Aug
2003
Brad Strickland
S. D. Schindler
11
The House Where Nobody Lived
Oct
2006
Brad Strickland
Bart Goldman
12
The Sign of the Sinister Sorcerer
Oct
2008
Brad Strickland
Bart Goldman

Question: What are the novels that Strickland wrote what did he accomplish?
Answer: Strickland wrote nine Lewis Barnavelt novels and few were outlined by John Bellairs.